Spool or bobbin



f patented Dee.r17,194o o 2,225,551

@UNITED `STATES PATENT OFFICE 'o 2,225,551` j sroor. on noBBm Harry D, Clinton, Johnson City, N. Y.

Application september s, 1939, serial No. 294,023

' 7 claims. (cima-*123) This invention relates to spools and bobbins, or Fig. 8 is a corresponding plan or end elevation toimprovements therein, having reference more ofthe bottom of said spool. i particularly totextile spools and bobbins of the In the illustrative spool embodiment, thebardifferent kinds or types used for various operarel or body part comprises a length of a specially tion purposes in textile mills. formed tubular bar IU of a generally cylindricalV t? Oneof the objects of the invention is to procontouration. Said vtubular bar,.preferably corn'.` videapecially 'strong but light-weight spool or posed of metal, consists in this instance of inag-v bobbi capable of withstanding the heavy stresses neSium alley Which heS been found 'C0 'be Perand other Vforces to which these articles are subtieulelly Suitable because `0f ltS eXeePifinal 10l iected in modern high-pressure production pracstrength and lightness, and also because of its 10 tices; that is, a spool or bobbin `much stronger excellent machinability. I t constitutes struc@` l and lighter than the ordinary like article, which turally a very thin wall or mere shell member will successfully and durably sustain the effects having a plurality of v,integral longitudinalrigid'- i of high rotationalspeed winding and twisting, ifyng and reinforcing rbS l0. O11 its innerA Side l5 steaming,`and knocking about, without warping, spaced therearound equidistantly,` saidy ribs be- 15 swelling, splitting or looseningapart. ing substantially semi-circular in cross section. Another 0f the bjects" is t0 provide such a, This Speclalfol'matiol'l in the CaSe' 0f magriesillm spool or bobbin having a high degree of accuracy alley DI other metal Composition is advantagei in the form, balance and concentrlcity or its Ously.k produced by eXtruSion of the metal(` in` a parts, closely approaching that of static or permolten State thIOugh Suitable forming diesg'lt 20 fect vbalance permitting rotation at extremely might Of Course be DrOdneed by Casting, OI inthe highspeeds Without any throw from true center CaSe 0f Bakelite or some vother vtoolable materiell, resulting in warbleor vibration l A' by lathing or some other cutting operation; It lCombined with said objects, the general aim Will be understood that the generally Cylindrical and purpose is to provide an improved pracbal' Ine'lnbelnley be pelygenalfinsiele'd 0f ebS 25k ucabie spoo1orbobbm construction adaptable to lutely circular ,in Cross section, and, that' the the different forms or types and sizes 1n which aforesaid integral ribs may have some otherthan such" articles are used, and ailordlng a. machinathe Stated Shaping, Such es.' tljienglllel elfillale, bmty analaseembly of the parte with ease and Ifhe Section 0f tubular bar In comprising the 'precision i e barrel is machined to the proper length and true-5 30 An illustrative spool embodying the .invention {less-*referring t0 axial balance and endplnlnb* in one practicable form is shown for example in lng-after which 1t is drilled endWiSe with Screwthe acc'ompanymg,ek drawings, by reference to holes Il in the integral ribs thereof at either end which in further description of the same herein- (see Fig' 2) preferably 'though not necessarily i i in each of said ribs depending upon the num-4 3o afterthe invention will `be readily understood.

In said drawings: ber, ythe said holes being concentrically centered V l around the longitudinal axis and parallel there- Fig. 1 is a perspective view of the barrel blank, with These holes are made Somewhat smaller Fig. 2 is asimilar view of the finished barrel tha n the thread diameter of the screws they are `40 Withhea'd and attachment means at one end m to receive and are themselves unthreaded or 4.0

, Separated applicative relation thereto;` smooth sidecL 'Fg 31S a' longtudmal Section View 0f the To the hole-drilled end of said barrel bar a Complete S9001 taken diametcany thereof; head i2 of disc-plate form in this instance is 'Fig. 4 1S a like SeetiOn 0f the Seme S9001 'heV- applied. This head preferably 'consists of a A ling an 1111101 fitted Core 012bea1111g-membertaken strong metal such as stainless steel'or the like, 45 somewhat off the diametrical 0n the line 0f 'a and will desirably be surface or rim hardened chord; c l I to resist nicking and other common defections. l F18. 5 iS el Similar Section 0f the Same Spool However, hard vulcanized `fibre, or any other having a separately attached inner core or bearappropriate material, may instead be` used. ing member. Holes lf3 formed through its thickness in corre- 50 Fig. 6 is a longitudinal section of a modicaspondence with 'the holes drilledin saidbarrel tion of the spool formed with separate core parts end render it applicable for attachment theree at opposite ends; y to, said holes being desirably counter-sunk in its Fig. 'I is a plan or end elevation view of the top outer face to provide a counterseating for the .g5-of the spool of Fig. 6; and attaching screws. It is attached byscrews I4 55 passed through' these holes intoy the holes of the barreL. the said.' screws being preferably hard metal screws oi'thespecial kind known as self-l threading." or tappingscrews which cut their own threads intok the metal when driven into one head` applied to. one-'end wouldbe used in thegudgeons thereinto.

case. of' a. cop or the like single-head bobbin, 'in which event the opposite end would` bev capped with a mere face-over headk of the same diameter as the barrel. It will be understood that the actuat form of the head applied to either or both ends isaf matter of choice according to the kind ory type of spool or bobbin to be produced, the

fundamental. construction. being applicable to thevariousforms of such articles used in the textilel industry; The same is true with reference to size, there being no limitation in this respect'. This: fundamental construction of the invention. is, however, especially applicable to4 any bobbin or spool that'is` to revolve athigh speed,

`requiring extreme accuracyV in its form, andv a precise if not absolutely static balance and` concentricity. It also applies especially to any bobbin or spool that is to be used for steaming or setting the twist on yarn, such as take-up" bobbins or Winder spinders, in which cases either solid or hollow pintl'es may be fixed in the central apertures of the heads. as isv common to this: type. of such articles. Still further, this fundamental construction is applicable with particular advantage to wire spools to. be used in connection with very ne spun'wire.

In certain if not. most cases: it will be desirable to provide the spool withv better gudgeon supportivebearings than the central apertures l5 in their heads a-lone aio-rd. This may be done in a number of different ways.

Fig. 4 illustrates one practicable means of providing a gudgeon bearing or bushing which is probablyl also the simplest. In this provision a centrall core or filler I6 of wood is fitted loosely in .the barrel, said core having opposite end portions Ita bearing close against the surrounding ribs' llla oi the barrel so as to be centered and held frictionally therewithin and being axially bored in register with the central aperturesv of the heads so as to receive the extension of the This core or ller is merely inserted before the last of the heads is applied and its ends may extendagainst or substantially against the inner sides of said heads. While woodv isused as the material of the core in' this instance, it may of course be made ofsome other materialv such as fibre composition.

Fig. 5 illustrates another practicable means of providing such a bearing or bushing. In this case a relatively thin metal tube Il is extended axiallythrough the spool with its ends il swaged over in counter-sink upon the-outer sides of the heads 'around their central apertures. To accommodate this arrangement of course it is. necessary for said central apertures of the heads to be made slightly larger than normal, to the extent of the thickness of the tube, and the tube mustof course be of an inner diameter to receivethe gudgeons upon which the spool is meant to lit. 'Y

The modification of Fig. 6 illustrates what may be the ordinarily preferred bearing or bushing provision. In` this provision a metal, sleeve |18;y is` fitted into. the intended topv or upper end` of the spool through vthe central aperturev of the head at that end. -This sleeve has an outer peripheral or lateral flange I8a seating upon they outer face of saidzheadnand. formed with holes (not refer-y enced) registering with the screw holes in thev head and barrel end. The regular attachingscrews Ml are passed through thesel holes. tofasten', it tight uponthe head as the latter is itself attached to the barrel. Similarly, at the intended bo'ttom or lowerend of the spool, a substantial-ly corresponding .metal sleeve I9 is. applied by itsV flange I9, therlatter inr this instance however being speciallyjformed in its outer end with ai diametrical closs slot 20 so as at the same time; to provide a.`twister" attachment to the headl at that end.

The described spool or bobbin will obviously be exceptionally strong and. sturdy, especially when.`

made entirely of metal. asy will generally be preferred. In addition it has thel decided ativan-- tage that it `is machinable in. all its'parts to aimpervious tomoisture and heat so that itcan will deform or crush only from intense striking` force or pressures applied` thereto.

It will be understood from the foregoingv specification thatcertain variations and substitutions can ber made yin the form and composition of the parts of the'spool wholly within the allowable:

scope and essentials of the invention. It is therefore not intended to limit the invention. by

the following claimsto the specific forms andl compositions, or to the specific construction illustrated and described herein|` beyond what. said claims by their terms themselves impose.

Having thus described my invention, what I claim as new and desire to secure by Letters Pat-- ent of the United States is as follows:

1. A spool or bobbin, comprising a nangeless cylindric barrel vconsisting of a length cf a tubular thin-wall .body of magnesium alloy having a plurality of unconnected integrally formed cross-sectionally solid longitudinal 'ribs Von its inner side spaced equidistantly therearound and extending the full length thereof, a rseparate iianging head of a. hard material composition on each end of the barrel, and metalscrew elcments passed through said heads into and4 in threaded engagement with said ribs of therbarrel endwise of the latter so asto clampably `at tach the heads to the barrel atsaid ends.

2. In a. spool or bobbin `construction embodying a vwholly unitary iiangeless barrel vof cylindric form anda separate hanging disc form head attached thereto, the improvement which con-- sists in the provision of the barrel by a tubular thin-wall body member comprising a strong solid material formed with a plurality of unconnected integrally formed solid longitudinal ribs on its inner side spaced circumferentially therearound and extending the full length thereof, said ribs serving to rigidify and strengtheningly reinforce the said body member and providing dennite circumferential areas of mass of the material thereof of suilicient thickness to serve for the reception of the head attaching means, said means constituting screw-like elements extended through the head into and in threaded engagement with the said ribs so vas to clampablysecu're the head at either end of the barrel.

3. In a spool or bobbin construction embodying a Wholly complete fiangeless barrel of cylindric form and a separate flanging disc form head attached thereto, the improvement which consists in the provision of the barrel by a tubular thin-Wall body member comprising a solid magnesium alloy material formed with a plurality of unconnected integrally formed solid longitudinal ribs on its inner side spaced circumferentially therearound and extending the full length thereof, said ribs serving to rigidify and strengthveningly reinforce the said body member and providing definite circumferentially disposed areas of mass of the material at the ends thereof of sufficient thickness to serve for the reception of the head attaching means thereto, the said means constituting screw-like elements extended through the head into and in threaded. engagement with the said ribs so as to clampably draw and secure the head at either end of the barrel. 4. 1n a spool or bobbin construction embodying a wholly unitary fiangeiess barrel of cylindric form and separate flanging disc form heads attached thereto at opposite ends, the improvement which consists in the provision of the barrel by a tubular thin-wall body member comprising a .strong solid material formed with a plurality of unconnected integrally formed solid longitudinai ribs on its inner side spaced circumferen-tially therearound at equal distances apart and extending the full length thereof, said ribs serving to rigidify and strengtheningly reinforce the said body member and providing predetermined` definite areas of mass of the material thereof of sufficient thickness to serve for the reception of the means attaching the heads lrel by a tubular thin-wall body member comprising a solid magnesium alloy material formed with a plurality of unconnected integrally formed solid longitudinal ribs on its inner side spaced circumferentially therearound at equal distances apart and extending the full length thereof, said ribs serving to rigidify and strengtheningly reinforce the said body member and providing deflnite circumferentlaily spaced areas of mass of the material thereof of sufficient thickness to serve for the reception of the means attaching the heads to the ends of the. same, the said means constituting screw-like elements extended through the heads into and in self-threading engagement with the said ribs so a's to clampably draw and secure the heads broadside against opposite ends of the barrel.

6. A spool or bobbin according to claim l, including a core bushing therein extending axially through the barrel with a centering peripheral fit close against the longitudinal edges of the ribs surrounding the same and providing gudgeon bearings in the opposite ends of said spool.

7. A spool or bobbin according to claim 1, including separate bushing sleeves providing gudgeon bearings in opposite ends of the spool or bobbin fastened in place along with the head at each end by the attaching screw elements passed therethrough into the ribs of the barrel, one of said bushings being formed to provide a twister attachment for the spool at one end.

HARRY D. CLINTON'. 

